surface acoustic wave
31Acoustic quieting — This article primarily discusses mechanical and acoustic noise. See Noise reduction for electronic noise. : For noise masking by saturation, see Sound masking or pink noise.Acoustic quieting is the process of making machinery quieter by damping… …
32Acoustic Doppler Current Profiler — Head of an ADCP with the four transducers ADCP view ahead, mo …
33acoustic ohm — any one of several units measuring sound resistance. These units got their name by analogy with electric resistance, which is measured in ohms. The sound resistance across a surface in a given medium is defined to be the pressure of the… …
34acoustic impedance — noun Physics the ratio of the pressure over an imaginary surface in a sound wave to the rate of particle flow across the surface …
35acoustic radiation pressure — noun (acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave • Topics: ↑acoustics • Hypernyms: ↑radiation pressure, ↑corpuscular radiation pressure * * * noun : a feeble net increase in atmospheric… …
36Ocean acoustic tomography — The western North Atlantic showing the locations of two experiments that employed ocean acoustic tomography. AMODE, the Acoustic Mid Ocean Dynamics Experiment (1990 1), was designed to study ocean dynamics in an area away from the Gulf Stream,… …
37Cnoidal wave — US Army bombers flying over near periodic swell in shallow water, close to the Panama coast (1933). The sharp crests and very flat troughs are characteristic for cnoidal waves. In fluid dynamics, a cnoidal wave is a nonlinear and exact periodic… …
38Electro Magnetic Acoustic Transducer — An Electro Magnetic Acoustic Transducer (EMAT), is a non contact inspection device that generates an ultrasonic pulse in the part or sample inspected, instead of the transducer. The waves reflected by the sample induce a varying electric current… …
39Interference (wave propagation) — Two point interference in a ripple tank. In physics, interference is the phenomenon in which two waves superpose each other to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of waves that are… …
40Sea surface temperature — Weekly average sea surface temperature for the World Ocean during the first week of February 2011, during a period of La Niña …
